EP2660363A2 - Anode réglable - Google Patents

Anode réglable Download PDF

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Publication number
EP2660363A2
EP2660363A2 EP13166204.1A EP13166204A EP2660363A2 EP 2660363 A2 EP2660363 A2 EP 2660363A2 EP 13166204 A EP13166204 A EP 13166204A EP 2660363 A2 EP2660363 A2 EP 2660363A2
Authority
EP
European Patent Office
Prior art keywords
anode
segment
positioning device
segments
workpiece
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP13166204.1A
Other languages
German (de)
English (en)
Other versions
EP2660363A3 (fr
Inventor
Matthias Kurrle
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
STOHRER IPT AG
Original Assignee
IPT - International Plating Technologies GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by IPT - International Plating Technologies GmbH filed Critical IPT - International Plating Technologies GmbH
Publication of EP2660363A2 publication Critical patent/EP2660363A2/fr
Publication of EP2660363A3 publication Critical patent/EP2660363A3/fr
Withdrawn legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
    • C25D17/10—Electrodes, e.g. composition, counter electrode
    • C25D17/12—Shape or form
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D21/00—Processes for servicing or operating cells for electrolytic coating
    • C25D21/12—Process control or regulation

Definitions

  • the invention relates to a device for the galvanic coating of a workpiece, in particular an adjustable anode.
  • Such devices are used for example for coating gravure cylinders or other machine parts.
  • Anodes which can be used for workpieces with different geometries. However, these usually have a poor galvanic coating efficiency, resulting in long coating times and high energy consumption.
  • Such a device allows good efficiency for workpieces with different geometries.
  • Fig. 1 and Fig. 2 They have two cross sections through a galvanizing 10. It has a trough 12, in which a galvanic bath 13 (electrolyte with additives) is located, the surface 13 'is located.
  • a workpiece (eg rotogravure cylinder or machine part) 14 is located partially or completely in the galvanic bath 13 and is preferably mounted in such a way that it rotates 18 can perform about a rotation axis 16.
  • An anode 30 at least partially surrounds the workpiece 14, and in the present embodiment has the shape of an upwardly open channel or U-shaped cross section. In electroplating, a section perpendicular to the axis of rotation 16 of the workpiece 14 is usually regarded as a cross section.
  • the anode 30 has a first anode segment 31 and a second anode segment 32, which are connected by a hinge 35. There is no further anode segment between the first anode segment 31 and the second anode segment 32.
  • the hinge 35 is a hinge joint, but it could, for example, also have one or more ball joints.
  • the anode segments 31, 32 run at least partially alongside each other in the longitudinal direction or at least partially parallel to one another in the longitudinal direction, so that at least partially a plurality of anode segments 31, 32 are present in cross section.
  • a positioning device 60 has a first arm 61 and a second arm 62, wherein the first arm 61 is connected via a hinge 38 with the first anode segment 31 and the second arm 62 via a hinge 39 with the second anode segment 32.
  • the positioning device 60 allows a linear movement of the first arm 61 along a linear axis 63 and a linear movement of the second arm 62 along a linear axis 64, see. Fig. 2 ,
  • a schematically indicated current source (or voltage source) 20 is connected with its negative pole via a line 21 to the workpiece 14 and with its positive pole via lines 22 to the anode segments 31, 32 or to the anode 30.
  • a current flows between the anode 30 and the workpiece 14, thereby causing deposition of a metal (e.g., copper, chromium) or metal alloy (e.g., copper, chromium) contained in the plating bath 13.
  • a metal e.g., copper, chromium
  • metal alloy e.g., copper, chromium
  • Nickel-phosphorus, bronze with metallic and / or non-metallic additives on the workpiece 14.
  • the galvanic bath 13 preferably covers at least the anode 30, to avoid efficiency losses.
  • the rotation 18 of the workpiece 14 results in a uniform coating.
  • the distance D of the anode 30 to the workpiece 14 is important to the success of the electrodeposition.
  • the distance D must be at least as large at all points that the workpiece has no contact with the anode 30.
  • a large distance D between the anode 30 and the workpiece 18 requires a high voltage of the current source 20 to achieve the required current density. A small distance allows the use of a smaller voltage, and this saves energy.
  • Fig. 3 shows the adjustment of the anode 30 for a workpiece 14 with a relatively small diameter.
  • the first anode segment 31 and the second anode segment 32 have been moved toward one another by the positioning device 60, cf. Linear movement 63, 64 off Fig. 1 ,
  • Fig. 4 shows an adjustment of the anode 30 for a workpiece 14 with a relatively large diameter.
  • the first anode segment 31 and the second anode segment 32 are opened wide relative to each other to provide space for the large workpiece 14. These are - as in Fig. 1 - the first arm 61 and the second arm 62 have been moved down and away from each other, as indicated by the arrows 63, 64.
  • Fig. 5 shows a detailed view of the first anode segment 31, and Fig. 6 shows the complete anode 30.
  • the first anode segment 31 and the second anode segment 32 are constructed basically the same, so that the following description of the first anode segment 31 correspondingly applies to the second anode segment 32, unless explicitly noted differences.
  • the first anode segment 31 has ribs (reinforcing ribs) 40 fixed to a profile bar 42.
  • the profile bar 42 preferably extends over the entire length of the anode 30, but it may be z. B. also be formed in several pieces. He has z. B. a substantially rectangular profile.
  • the ribs 40 have on their side facing the workpiece 14 a predetermined profile 45 to which the actual anode surface 41 is fixed, in Fig. 5 as a thick black line and in Fig. 6 is shown schematically over the entire surface.
  • the attachment of the anode surface 41 to the ribs 40 is effected for example by welding or soldering.
  • the anode surface 41 is usually made of an expanded metal, as shown in FIG Fig. 6 with 41 'is indicated on a portion, but it can, for. B. also be formed over the entire surface.
  • ribs 50 are fixed, to which a guide 55 for an anode panel 53 is attached.
  • the guide 55 preferably has two profiled bars 51, 52 which extend in the longitudinal direction at least over part of the anode 30.
  • the anode panel 53 is slidably disposed on the guide 55 in the manner of a carriage.
  • the anode panel 53 extends in cross-section from the guide 51, 52 along the anode surface 41 to the hinge 35th
  • the materials used for the anode 30 depend on the galvanic bath 13 to be used, cf. Fig. 1 ,
  • the ribs are 40, 50 and the anode surface 41 formed of titanium.
  • the profile bar 42 is formed of copper and surrounded by a layer 43 of titanium. Since copper conducts electricity better than titanium, the current can be well distributed over the profile bar 42 and fed to the anode surface 41.
  • the anode panel 53 is preferably made of an electrically non-conductive material such. As plastic is formed and is pushed into the region of the associated axial end of the workpiece 14 to reduce in this area the electrodeposition, which is otherwise particularly heavily coated due to the high field strength occurring there, which is e.g. in gravure is not desired.
  • the hinge 35 is preferably formed by a bore in the ribs 40, in which a sliding bushing 36 (eg made of plastic) is pressed.
  • a shaft 37 is inserted, which is preferably secured against axial displacement.
  • the shaft 37 extends over the entire length of the anode 30 or at least over half of the anode 30, to effect an additional stiffening of the anode 30.
  • the hinge 35 is disposed between the first anode segment 31 and the second anode segment 32 and connects them in an articulated manner.
  • the anode segment 31, 32 is stable in itself, so that at a predetermined position of the arms 61, 62, the position of the joint 35 and the anode segments 31, 32 is defined.
  • the hinge 35 is not electrically conductive or poorly conductive through the sliding bush 36 made of plastic, so that both anode segments 31, 32 to the power source 20 from Fig. 1 must be connected.
  • the anode has 30 Maisier Schemee 46 for electrical connection of the power source 20 from Fig. 1 with the anode 30.
  • the Kunststoffier Schemee 46 preferably have threaded holes 47 which extend into the profile bars 42 into it. Electrical lines 22 are connected via connectors 23 with the Bachier Schemeen 46.
  • the plugs 23 are preferably provided with a thread and a fluid-tight seal in order, after the plug 23 has been screwed in, to fill the plating bath 13 (without risk of damage or coating). Fig. 1 ) to allow above the Maisier Schemes 46. Unused threaded holes 47 are preferably also sealed.
  • Fig. 7 shows the part of the positioning device 60 which is connected to the first arms 61.
  • the other part for the arms 62 is basically the same, and the description applies accordingly, unless it is explicitly pointed to differences.
  • the arms 61 and the arms 62 are basically the same, so that only one arm is described.
  • the two first arms 61 in this embodiment have a distance of about 650 mm, this being dependent on the geometry of the workpieces 14 to be coated.
  • the first arm 61 is rigidly connected to a rod 71.
  • the first arm 61 is fixedly connected to a clamping piece 66, for. B. by welding, and the clamping piece 66 is fixedly connected to the rod 71, z. B. by sortedklemmung.
  • the first arm 61 has the shape of an inverted L, so that it over the edge of the tub 12 (FIG. Fig. 1 ) can grab.
  • a block (bearing block) 73 shown only in half has a rail 72 which forms a guide 70 together with the rod 71.
  • the guide 70 is a linear guide, which allows a linear movement of the rods 71, as indicated by the arrows 63.
  • the angle ⁇ between the vertical line 74 and the rod 71 is preferably not equal to 0 ° and not equal to 90 °, ie neither horizontal nor vertical, more preferably in the range of 10 ° to 80 °, particularly preferably in the range of 15 ° to 60 °.
  • This slope causes a movement the rod 71 in one direction, a movement of the arm 61 inwardly and upwardly, and the reverse movement of the rod 71 causes a movement of the arm 61 downwardly and outwardly.
  • this movement is transmitted to the anode 30 and to the first anode segment 31.
  • the rods 71 are automatically adjustable.
  • a control device 88 and a controllable drive 80 are provided, wherein the drive 80 drives a gear wheel 82 via a - not visible from this perspective - connected to the drive 80 gear wheel controllable.
  • the gear 82 is connected to gears 86 via a shaft 84, and the gears 86 drive the rods 71.
  • the rods 71 are preferably designed as racks with corresponding teeth 87, wherein the guide 70 and the drive 86, 87 of the rods 71 can also be designed spatially separated.
  • an electronically commutated DC motor is preferably used, preferably via a planetary gear drive gear 82 drives. But there are also other drives possible.
  • the drive 80 is preferably assigned an absolute value transmitter 89.
  • an absolute value transmitter 89 With the aid of the absolute value generator 89, it is possible, for example, to move the rod 71 into an end position (for example the lowest position), wherein the reaching of the end position, for example, can be detected via a motor current limit. Subsequently, the desired position for the anode 30 can be precisely adjusted from this defined starting position with the aid of the absolute value transmitter 89.
  • the blocks 73 are provided with attachment means 75 for attachment of the positioning device to the tub 12 Fig. 1 or provided on a machine frame.
  • Fig. 8 For example, the left block 73 is fully illustrated, and the right block 73 is omitted.
  • FIGS. 9, 10 and 11 show possible settings of the anode 30 for workpieces 14 with different diameters.
  • the effectiveness ranges of the anode 30 lie.
  • a high efficiency is indicated in the figures with "+”, an average effectiveness with "0” and a bad effectiveness with "-”.
  • the axis of rotation 16 is in each case at the same height, since the clamping of the workpieces 14 usually takes place always at the same point of the galvanic coating system 10.
  • Due to the oblique arrangement of the rods 71 the anode 30 of Fig. 9 to Fig. 11 both folded and moved to the upper joints 38, 39 upwards. This leads to a high efficiency of the anode 30 for the different diameters.
  • the hinge 35 is opened so far that the angle between the anode surface of the first anode segment 31 and the Anode surface of the second anode segment 32 is about 180 °.
  • the angle is about 90 °.
  • FIGS. 12, 13 and 14 show a rigid anode 130 of the prior art. Due to the solid V-shaped form of the anode 130, a coating of workpieces with different diameters is possible, wherein the area effective for the coating with the designation "+" is significantly lower than that of the anode 30 Fig. 1 ,
  • the anode surface 41 of the anode segments 31 and 32 respectively in cross section has a shape that is neither quite straight nor evenly curved.
  • the cross section of the anode surface 41 is curved in a first (middle) region 100, and it is surrounded on both sides by regions 101, 102 with a smaller curvature than in the region 100.
  • the term curvature also includes anode surfaces 41, which have a series of straight sections connected by creases, as a result of which also leads to a corresponding curvature of the anode surface 41.
  • the outer regions 101, 102 preferably pass in a subarea facing away from the region 100 in straight lines (curvature 0). Simulations have shown that with such Anode surface, the average distance between the workpiece 14 and the anode surface 41 for different diameters of the workpiece 14 can be kept low.
  • Fig. 15 12 schematically shows an alternative embodiment for an anode 30, wherein on the left side a setting for a workpiece 114 with a large diameter (eg 335 mm) and on the right side a setting for a workpiece 114 'with a small diameter (eg 230 mm) is shown is.
  • the anode 30 has, in addition to the anode segments 31, 32, a middle third anode segment 110 which is connected via a joint 35 'to the anode segment 31 and via a joint 35 "to the anode segment 32. Because of the middle segment 110, it is advantageous to position and position (orientation) of the anode segments 31, 32 in order to clearly define the position and position of the anode segment 110. In the present exemplary embodiment, this is achieved by the position of the anode segments 31, 32 at respectively two points 38, 115 and 39, respectively , 115 'is set.
  • a linkage (coupling rod) 122 is fixed between a fixed attachment point (support) 120 and the joint 38, and a linkage (coupling rod) 123 is fixed to a fixed attachment point (support) 121 and the joint 115.
  • the linkage 122, 123 and 122 ', 123' Via the linkage 122, 123 and 122 ', 123', the position and position of the anode segments 31, 32, 110 can be clearly defined.
  • the linkage 122, 122 ' may be connected to a controllable drive 80, cf. Fig. 7 ,
  • the anode segments 31, 32 have a first curvature in cross section on the side facing the anode segment 110, and a second curvature on the side remote from the anode segment 110, wherein the first curvature is greater than the second curvature is.
  • the anode segment 110 has a substantially constant curvature, but it may also have regions with different curvatures, wherein it is preferably mirror-symmetrical to the vertical central axis.
  • the guide 71, 72 for the arms 61, 62 can also be formed as a curved guide, in order to enable, for example, in other geometries of the anode segments 31, 32, an improved positioning of the anode.
  • the joints 35, 38, 39, 35 ', 35 ", 115, 115' preferably extend in each case parallel to the axis of rotation 16.
  • embodiments are also possible in which at least some of these joints are not parallel to the axis of rotation 16 runs.
  • Only a first arm 61 and a second arm 62 may be used.
  • an anode segment 110 or else a plurality of anode segments 110 can be provided.
  • the anode surfaces 41 of the anode segments 31, 32, 110 are in cross section on their during the coating the workpiece 14 side facing in partial areas (eg 100, 101, 102 in Fig. 9 ) at least partially concave and preferably in subregions (eg 101, 102 in Fig. 9 ) at least partially straight. It is also possible for the anode segments 31, 32, 110 to be in partial areas (eg 101, 102 in FIG Fig. 9 ) at least partially convex.
  • anode segments 31, 32, 110 When using other joints 35 and / or at least three anode segments 31, 32, 110 is a relative movement of the anode segments 31, 32, 110 to each other possible, which also contains a translational component in addition to a rotational component.
  • the positioning device 60 may be formed in a simplified embodiment without a drive 80, and manual adjustment may be provided.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Automation & Control Theory (AREA)
  • Electroplating Methods And Accessories (AREA)
EP13166204.1A 2012-05-02 2013-05-02 Anode réglable Withdrawn EP2660363A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012103846A DE102012103846A1 (de) 2012-05-02 2012-05-02 Verstellbare Anode

Publications (2)

Publication Number Publication Date
EP2660363A2 true EP2660363A2 (fr) 2013-11-06
EP2660363A3 EP2660363A3 (fr) 2018-03-28

Family

ID=48193182

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13166204.1A Withdrawn EP2660363A3 (fr) 2012-05-02 2013-05-02 Anode réglable

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Country Link
EP (1) EP2660363A3 (fr)
DE (1) DE102012103846A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3128045A4 (fr) * 2014-03-31 2017-12-27 Think Laboratory Co., Ltd. Appareil et procédé de placage de cylindre

Family Cites Families (12)

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Publication number Priority date Publication date Assignee Title
US2477808A (en) * 1946-05-08 1949-08-02 Carl G Jones Electrolytic apparatus for treatment of moving strip
US2940917A (en) * 1957-11-07 1960-06-14 Chrome Crankshaft Co Inc Electroplating anode
DD208379A1 (de) * 1982-08-04 1984-05-02 Werner Oppermann Vorrichtung zur gleichzeitigen verchromung beider flanken von kolbenringnuten
FR2563540B1 (fr) * 1984-04-26 1989-05-05 Alsthom Atlantique Dispositif pour effectuer un depot metallique sur les parties frottantes d'un rotor de turbine
JP3207909B2 (ja) * 1992-02-07 2001-09-10 ティーディーケイ株式会社 電気めっき方法および電気めっき用分割型不溶性電極
TW318320B (fr) * 1995-08-07 1997-10-21 Eltech Systems Corp
DE19628906C1 (de) * 1996-07-18 1997-07-24 Helmut Kever Anodenzelle mit bogensegmentförmigem Anodenquerschnitt für elektrophoretische Metallbeschichtungsbäder
US8298395B2 (en) * 1999-06-30 2012-10-30 Chema Technology, Inc. Electroplating apparatus
DE10249572A1 (de) * 2002-10-24 2004-05-13 Robert Bosch Gmbh Vorrichtung zum galvanischen Beschichten
US8101052B2 (en) * 2006-11-27 2012-01-24 Taiwan Semiconductor Manufacturing Co., Ltd. Adjustable anode assembly for a substrate wet processing apparatus
DE102007015641B4 (de) * 2007-03-31 2011-07-14 Höllmüller Maschinenbau GmbH, 71083 Vorrichtung und Verfahren zum Galvanisieren von Gegenständen
WO2012043514A1 (fr) * 2010-09-30 2012-04-05 株式会社シンク・ラボラトリー Procédé et dispositif de placage de cylindre

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3128045A4 (fr) * 2014-03-31 2017-12-27 Think Laboratory Co., Ltd. Appareil et procédé de placage de cylindre
US10041185B2 (en) 2014-03-31 2018-08-07 Think Laboratory Co., Ltd. Cylinder plating apparatus and method

Also Published As

Publication number Publication date
DE102012103846A1 (de) 2013-11-07
EP2660363A3 (fr) 2018-03-28

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